while u.s. officials talking about serious chemical weapons -- wh yare -- why are u.s. officials talking about syria's chemical weapons now? >> officials have been quoted as saying they have seen activity, that these weapons are being moved around, possibly in preparation for their use. it is very difficult to read the assad government and find out exactly what they are doing. are they trying to protect them? are they trying to bluff? we have heard from certain officials saying they have no intention of using chemical weapons against their own people. of course, that leaves open the possibility that they might reserve the right to use them if they are attacked from abroad. it is important to mention this is not the first time that we hear the obama administration's aid that the use of chemical weapons by syria would be -- the obama administration say that the use of chemical weapons by syria would be a mistake. government were to fall, what might happen to those chemical weapons? >> that is a real concern. beyond worrying that the assad government might use them, there